2 sump questions

[SpikeAZ]

1. The return pump of my sump is a mag5 with vinyl tubing that eventually elbows into the tank. However, when the power of the pump is turned off, it starts to work as a reverse syphon, returning water to the sump. Is there a way to correct this?

2. The water going to my sump is via a HOB overflow and PVC, with about 3 elbows. Its output produces alot of bubbles and occasionally burbs. Is there anything I can do to correct this, or should I not worry about it?

[Gatorfreak]

1. You need a syphon break. A small hole in your return piping just below the surface level of the main tank. When it starts to syphon, the water level will drop a little, allowing air into that hole and breaking the syphon.

2. I have a built-in overflow and have the same burping issue. I never have solved. I'd like to know if you find a solution.

[krap101]

you need a t and get an end cap and drill a hole in it. that'll let the air out. i read it soemwhere

[greenmaji]

Are you guys using the z-flow design or a durso design of some sort?

[RLG2182]

1) Either drill a syphon break into the return line, or position your return nozzles close to the top (like I have mine). That way, only a little bit of water gets returned back into the sump.

2) http://www.dursostandpipes.com

Check the popular modifications sections. I did the Stockman Hang-on Overflow modification. Worked GREAT... no noises to speak of. HTH